Thread: Conversion Holeshot
04-02-2009, 02:06 PM #1
Can someone with a running GPRXP give me a little info on how it holeshots. I will be using a HO pump with a dynafly and I'm just wondering exactly how bad holeshot is.
What ski could you compare it to?
Does it make up for holeshot in midrange?
I want to run primarily a drag setup so holeshot is important I just don't want to spend 1000+ on the seadoo adaptor and pump which "may" cost a few mph up top.
Please share your opinion or experience. thanks
04-02-2009, 02:23 PM #2
- Join Date
- Jul 2007
i have a running GPRXP and iu have a skat pump on it 155 and it cavitats alot and i have HO pump but haven`t installed it yet but i was told it cavitats much less than the skat
other way to go is the seadoo pump adapter or the 162 skat pump but i think on both of these pumps u will lose little on the top end
04-02-2009, 04:12 PM #3
Funny how the 250hp+++ Closed Course race skis dont cavitate a lick.
04-02-2009, 04:20 PM #4
04-02-2009, 04:33 PM #5
The holeshot on my ski is a POS. I have the HO pump. I will be changing to the Seadoo pump this weekend. I have seen the difference between the Seadoo and Skat right in front of me and I have felt the difference between the HO and Seadoo on my own ski. It's indescribable. Whoever disagrees with this must be one of those tuners who knows how to set up a pump shoe, nozzle, prop, grate and plate to eliminate all cavitation. That's not me and I don't plan on paying for it to be done. My point is; for a bolt-on and go person, the Seadoo pump is my choice. I am also using an 800 grate instead of a 1200. A 1200 would reduce cavitation as we know by now. The majority of the conversions at the November 08 Hydrodrags that had a chance to win were be using a Seadoo pump for drag racing and an HO pump for top speed. I hear the Puerto Rico conversion is using a Seadoo pump for top speed. I suppose it's undebatable to say that the pump debate is still open for interpretation.
04-02-2009, 04:51 PM #6
Has anyone compared a 162skat and SD pump back to back? I'm interested to hear the comparisons on which is better all round?
04-02-2009, 08:07 PM #7
I am in the same boat is you - I will not have the $ for the Sea Doo pump and adapter but I will work toward a holeshot ski no matter what I am giving up on the top. Working with a 155mm 14 V set back with swirl props and a couple DF props in a HO pump.
04-02-2009, 09:02 PM #8
I'm going to try playing around with as much stuff as I can to get the best holeshot with minimal lack of top speed. Going to try different nozzles etc and see what I can come up with. i don't want to get holeshotted by stock skis. I was just curious to here what some people with running GPRXPs had to input.
04-02-2009, 09:26 PM #9
04-02-2009, 09:46 PM #10
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